JP2000268604A - Led indicating lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance efficiency of diffusion light emission by LEDs and to simplify a structure by providing a plurality of LEDs at intervals at an inner periphery of a globe or at a position adjacent to the inner periphery and making the LEDs perform diffusion light emission to a glove surrounding part opposed to the LBDs. SOLUTION: At an inner periphery of a globe 1, a plurality of LEDs 2 are mounted at prescribed intervals. Luminescence from the LEDs 2 equipped at the inner periphery of the globe 1 is diffused to an inner peripheral part (facing part) of the globe 1, is emitted, is transmitted and diffused and is emitted. Luminescence from the LEDs 2 located at the inner periphery of the globe 1 is high in diffusion efficiency because a distance up to the surrounding part of the globe 1 is taken sufficiently long, an irradiation range by the LEDs 2 to the outside becomes wide, even if a reflection means is not used, and visibility is improved. Because the LEDs 2 can be efficiently utilized and only a few of the LEDs 2 to be mounted are required, power is saved. Because nothing exists between the LEDs 2 and a display part, LED light is not damped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED display lamp which employs an LED as a light source so that light can be efficiently diffused and emitted from an inner peripheral portion of a globe serving as a display portion to an opposite peripheral portion.

[0002]

2. Description of the Related Art Conventionally, an LED as a light source has been used as an indicator lamp such as a signal notification indicator lamp.
The ones that have been used are widely used because they do not require frequent light bulb replacement like conventional incandescent bulb light sources and are resistant to factors such as vibration, and are especially used in various entrances and construction sites that require attention. It is currently used frequently.

However, since the LED has a small amount of light, a member such as a substrate on which a large number of LEDs are mounted is provided at the center of the glove serving as a display unit so as to emit light from the center to the periphery of the globe. The distance to the part is short, the light from the LED hits the glove before it diffuses sufficiently, it will be seen as a granular light source by the viewer, and it is efficient even if many LEDs are mounted It cannot be used.

Therefore, a device for diffusing light using a reflection means has been proposed. For example, there are a type using a drum-shaped reflecting portion (Japanese Utility Model Laid-Open No. 62-78770) and a type using a rotating parabolic reflector (Japanese Utility Model Application Laid-Open No. 63-176214). Since the light state is visually recognized as a granular light source or a linear light source and the visibility is inferior, a device using a conical reflecting surface (Utility Model Registration No. 2568899) has been devised in order to sufficiently emit light from the LED. In terms of reflection efficiency, the brightness is attenuated compared to direct light, and furthermore, if the reflection means for diffusing the light emitted from the LED is provided in the glove serving as the display unit, the cost increases and the entire display lamp becomes expensive. However, there still remains a problem that the size of the apparatus must be increased.

Therefore, in the present invention, the problem of mounting the LED at the center of the globe as the display unit and the problem of employing the reflecting means as in the conventional case described above are solved and the light from the LED is eliminated. It was invented for the purpose of being able to utilize it efficiently.

[0006]

SUMMARY OF THE INVENTION As described above, the present invention solves the problems of the prior art, improves the efficiency of diffused emission by LEDs, simplifies the structure, and provides a cost advantage. Regarding the configuration, first, as described in claim 1, an LED is used as a light source, and a display lamp having one or more stages of gloves serving as a display unit, wherein a plurality of gloves are provided at an inner periphery of the glove or at a position close to the inner periphery. It is characterized in that LEDs are provided at predetermined intervals and diffused and emitted to the periphery of the globe facing the LEDs.

[0007] By adopting such a configuration, the LED is directed from the inner surface of the glove serving as the display portion to the opposing surface (facing portion).
The light is emitted from a light source such as the above, so that the distance at which the light spreads can be secured, and uniform light emission can be performed on the display unit. In addition, since the light directly irradiates without the reflection means, the light is not attenuated and LE
Light from a light source such as D can be used efficiently, and power saving can be promoted.

[0008] Further, the reflection means is unnecessary and the cost is reduced.
In addition, since there are few components, there is an advantage that the number of failure factors is reduced. Next, regarding the means for providing the LED at the position close to the inner circumference or the inner circumference of the globe of the LED,
As described in claim 2, when a plurality of LEDs are mounted on a ring-shaped base provided along the inner periphery of the globe, it becomes very easy to mount the LEDs.

In particular, the ring-shaped substrate is formed integrally with the glove and comprises a rib located on the inner periphery of the glove. If the molded rib is formed as a ring-shaped base material, the LED can be easily mounted simply by forming an LED mounting portion on a part of the rib, which is convenient.

Next, the ring-shaped substrate is characterized in that the ring-shaped substrate is formed of a narrow plate attached along the inner circumference of the glove, so that the ring-shaped substrate is formed separately from the globe. The LED can be installed in the glove simply by mounting it on the inner circumference of the glove, and the narrow board is formed as a printed wiring board. This can further promote simplification of the structure.

According to a fifth aspect of the present invention, the ring-shaped substrate is formed of a tubular body made of a sheet or a film attached along the inner periphery of the glove.
The LED can be mounted on a cylindrical body made of a lightweight sheet or film, and the overall weight and cost can be reduced. Next, as described in claim 6, the ring-shaped substrate is formed by connecting a plurality of frames in a ring shape and attaching them along the inner circumference of the glove. Like the previous sheet or film,
Light weight and cost reduction, of course,
This leads to an improvement in the space ratio with respect to the emission of the ED (the number of objects to be shielded is reduced).

Further, when the ring-shaped base is made of a wire attached along the inner periphery of the glove, the ring-shaped base made of the wire further reduces the weight. Cost reduction and space ratio improvement will be achieved. Further, in addition to the LED being attached to the glove or a ring-shaped substrate along the glove, the LED is connected to a shielding plate of the glove and attached to a member provided to be located on the inner periphery of the glove as described in claim 8. The feature is that the LED can be attached to a connection member that hangs down from the upper shielding plate or rises from the lower shielding plate, and the LED can be mounted when the shielding plate is manufactured. The advantage is that the glove can be easily installed.

[0013] Further, the LED emits light straight to the periphery of the opposing globe, and as described in claim 9, the LED is provided so as to emit light in an oblique direction. Light emission in oblique directions can be realized,
This is convenient when the direction of light emission is changed. Further, regarding the glove serving as a display unit, in addition to transmitting the light in the direction of the LED and emitting the light to the outside, the glove is visually recognized.
When the globe is formed as a liquid crystal panel as described in, the light emission of the LED is used as a backlight, and a character, a symbol, a graphic, or the like as a signal is displayed on the outer surface of the glove in a liquid crystal display. The globe can be used for display purposes other than light emission.

[0014]

Next, an embodiment of the present invention will be described below with reference to the drawings. First, regarding the first embodiment, FIG. 1 is a plan view, and FIG.
Regarding the cross-sectional view, it is common to the drawings described later that the L positioned on the opposite side between the LEDs positioned on the left and right.
ED is not shown for convenience. A in the figure is an indicator light having one or a plurality of stages of gloves 1 serving as a display unit. The globes are made of a transparent synthetic resin, glass or the like material, and are directly attached to the gloves 1 using the LEDs 2 as light sources. As a specific example of the equipment, a plurality of LEDs 2 (in the case of FIG.
) Are attached at predetermined intervals. The mounting means of the mounting portion 3 is formed by using an adhesive, screwing, a metal material inserted into the glove 1,
The metal member serving as the mounting seat of the ED can also be spot-welded to a point, and the wiring of the LED 2 can be connected by a known method and is not shown. Numerals 11 and 11 'in the figure denote connecting parts of the globe 1, which are connected via shielding plates 10 and 10'. The effect of the shielding plates 10, 10 'is as follows.
Preventing mixed colors from illuminating when LEDs of different colors are on the top and bottom, and the LED on the off side
The irradiation range of the LED is shielded so as not to be erroneously recognized as ON by irradiation of the LED in the ON state as much as possible.

As described above, the light emitted from the LED 2 provided on the inner periphery of the globe 1 is diffused and emitted to the peripheral portion (facing portion) of the globe 1 facing the LED 2 and is transmitted and diffused from the globe 1. Will be emitted. Glove 1
The light emission from the LED 2 located on the inner circumference of the globe 1 has a sufficiently long distance to the periphery of the globe 1, so the diffusion efficiency is high and the irradiation range of the LED 2 to the outside becomes large even without using the reflection means, so that the visibility is very high. Can be improved. Therefore, the LED 2 can be used efficiently,
Since a small number of EDs is sufficient, power saving can be achieved.

Although not shown in the drawing, the globe 1 has slits formed on both or one of the inner and outer surfaces so as to become a diffusive lens, as is known. LED
The power supply to the power supply 2 includes a conductive path which forms a circuit inside the globe 1 (not shown). In the first embodiment described above, the LED 2 is directly attached to the globe 1. In the following second to sixth embodiments, the inner circumference of the globe 1 or the position close to the inner circumference is used. Shows a case where the LED 2 is mounted on a ring-shaped base material provided along the line, which makes it easy to mount the LED 2, and the ring-shaped base material is specifically described as 50, 60,. I will do it.

First, in the second embodiment, as shown in FIG. 3 in a plan view and FIG. 4 in a sectional view, the glove 1 and the rib 50 on the inner periphery of the glove are integrally formed of a material such as synthetic resin or glass. In the case where the rib 50 is a ring-shaped base material, insertion openings 51 and 51 'are provided in the rib 50 as shown in FIG. 21 and 21 'are pushed in so that they can be easily attached. In the figure, T indicates a power supply terminal. Preferably, a coating portion 52 corresponding to a circuit of a printed wiring board is formed on the surface of the rib 50 serving as the ring-shaped base material. By attaching the LED 2 to the rib 50 as described above, the LED 2 is simultaneously attached to the wiring board. Thus, the wiring board is formed integrally with the glove, and it is not necessary to prepare the wiring board for manufacturing the display unit, which leads to a reduction in the number of components and the number of manufacturing steps.

In the third embodiment, as shown in FIG. 6 in a plan view and FIG. 7 in a sectional view, a circular narrow plate 60 attached to the globe 1 along the inner periphery of the globe 1 is used as a ring-shaped base material. In this case, the glove 1 and the narrow plate 60 are attached to each other using a mutual engaging means such as a perforated receiving material and a hook material, or attached by means such as screws. This is convenient because a plurality of LEDs 2 can be attached to the narrow plate 60 at appropriate intervals in advance. It is very convenient if the narrow plate 60 serving as the ring-shaped base material has a circuit configuration as a substrate provided with a printed wiring 61 as shown in the figure. In the case of the third embodiment, since the globe 1 and the ring-shaped base are separate bodies, a base having an appropriate height can be provided according to the height of the globe 1, and the base is divided into a plurality. You may.

It should be noted that struts 62 in the vertical direction are provided at a plurality of positions with respect to the narrow plate 60 as shown by a two-dot chain line in FIG. 7 so that the narrow plate 60 can be stabilized. Power can also be supplied to the upper and lower display units. 4th
In the embodiment, as shown in FIG. 8 in a perspective view and FIG. 9 in a developed view, a cylindrical body 70 made of a sheet or a film is attached along the inner periphery of the globe 1 as a ring-shaped base material. LED2 at an appropriate distance from body 70
Are mounted on each other, and the LEDs 2 and 2 are
Are electrically connected by connectors C and C to sheet or film joints 72 and 72 ′ which are connected to each other by a conductive film portion 71 buried or attached by other means (joining or the like) to form the cylindrical body 70. And a connector corresponding thereto is provided on the power supply side in the display unit.

The case where the cylindrical body 70 is formed as a transparent body is preferable in terms of enhancing the light emission and diffusion of the LED 2. As the LED 2 attached to the cylindrical body 70 in this embodiment, the LE2
D, FIG. 10A showing a state where the coating is mounted.
As described above, a reflective material 24 is provided on the back side of the LED chip 23 to protect the front side from damage to the LED;
As shown in FIG. 10B, a case where a coating 25 for condensing LED light is performed, and a state where a LED and a lens cover are attached to a film provided with a conductive film portion.
The case where the chip 23 is covered with the lens cover 26 can be exemplified. Lens cover 26 protects LED2 and LE
It has a function of collecting D light.

In any case, the arrangement of the LEDs 2 can be freely set in, for example, a figure shape, a character shape, or the like, and the cylindrical body 70 is formed of a film or a sheet. In addition to this, it is also convenient for cost reduction. The fifth embodiment is shown in a plan view in FIG. 11, a sectional view in FIGS. 12 and 13 and a developed view in FIG. 14, respectively.
Are connected along the inner circumference of the globe 1 and the frame body 80 is made of a conductive material (for example, a pressed sheet material). The LED 2 is mounted by mounting means such as soldering, and the joining ends of the frames 80, 80 for forming a ring are connected to a connector or the like in the same manner as in the fourth embodiment. The joints 81, 81 'are formed to increase the number of the LEDs 80 and increase the position between the frames 80, 80 when the number of mounted LEDs 2 is increased. do it. In either case, the vertical spacing of the frame 80 is L
An interval that does not hinder emission of light by the ED from being diffused and emitted is required. In the case of the fifth embodiment as well, it is convenient to reduce the weight and cost as in the fourth embodiment. In addition, it is convenient to store the frame body 80 in a reel shape before mounting, in the case of the fifth embodiment.

Further, according to the sixth embodiment, as shown in FIG. 15 in a plan view and FIG.
This is a case where the LED 2 attached to the wire 90 is installed along the inner periphery of the globe 1. In addition to simplifying and reducing the weight as a means for installing the LED 2, the obstruction of LED light is minimized in the case of a wire. Can be suppressed.

In the first to sixth embodiments, the LED 2 is directly or indirectly mounted on the globe 1. However, FIG. 17 in the bottom view and FIG. As an example, by mounting the LED 2 on the inner side of the connection member 101 that is connected to the shielding plate 100 of the globe 1 and hangs down in the globe 1, the plurality of LEDs 2 can be located close to the inner circumference of the globe 1. In this case as well, the light emitted by the LED 2 can be diffused and emitted to the peripheral portion (facing portion) of the globe 1 facing the LED 2. In addition, since no special work is required for the glove, the glove can be attached to an off-the-shelf product. Further, the globe and the light source can be easily replaced.

In the above-described embodiment, the connection member 101 is hung below the shielding plate 100 above the globe 1, but is raised from the shielding plate below the globe 1. A connecting member may be provided, and in any case, it is convenient in that an LED can be mounted at the time of manufacturing the shielding plate, and the connecting member 101 is not limited to an arm-shaped form but may be a transparent one having the shape shown in the fourth embodiment. It is also possible to connect the shielding member 100 to a cylindrical member or a ring-shaped base made of the frame shown in the fifth embodiment as a connecting member.

In the case of FIG. 19 of a plan view and FIG. 20 of a sectional view shown as an eighth embodiment, the LED 2 is mounted inside a plurality of rectangular substrates 102 having an appropriate length. It is going to the center. In this case, the individual substrates 102 can be easily handled, and the cost merit is great. In addition, LED on implementation
In addition to the case where the device 2 emits light in a direction perpendicular to the opposite side of the globe 1, the ninth embodiment shows a plan view of FIG. Upper and lower shielding plates 1 as shown in FIG.
It can also be implemented at 0,10 ', in which case
By changing the direction of light emission, a different light emission state can be obtained, and the application of light emission can be expanded. LED2
Can be performed only on one of the upper and lower sides (not shown).

When the LEDs 2 provided at appropriate intervals in the circumferential direction with respect to the display portion are sequentially blinked in the circumferential direction to make it appear as if they are rotating, it can be implemented as a rotating indicator lamp. Although the globe 1 in each of the above embodiments is assumed to be capable of transmitting light, as a tenth embodiment, the globe is formed as a liquid crystal panel 1 ′ as shown in FIG. 23 in a plan view and FIG. 24 in a sectional view. The display unit 15 as a liquid crystal panel can be formed and implemented.
Utilizing the light emitted by D2 as a backlight, liquid crystal displays such as characters, symbols, and designs can be displayed as display contents on the surface of the globe that becomes the liquid crystal panel, and the LED equipment according to the above-described embodiments can be used as it is. Becomes

In each of the embodiments described above, the globe serving as the display section is exemplified by a cylindrical shape. However, the globe may be formed in a polygonal shape or any shape other than the cylindrical shape. In practice, the structure in each of the above embodiments is applied only when an LED having high directivity is used as a light source. For comparison, a light source that emits light uniformly in all directions, such as a light bulb, has little advantage. Also, L
When the irradiation angle of the ED is wide, the conventional structure can secure a certain wide irradiation area, but the structure of the present invention can secure a wider irradiation area and can use LED light more effectively.

For example, as shown in FIG. 25, in the case of using a condensing LED which is generally used, (a) shows a case where an LED is provided at the center of the globe, and (b) shows a case where a reflecting mirror is used. 2) shows the case according to the present invention in (c) and compares the visual recognition in the diffused direction. In the case of the present invention, the irradiation range is extremely wide. Similarly, comparison was made using LEDs having a wide irradiation angle. However, compared to FIGS. 26A and 26B, in the case of the present invention, it was visually recognized as a very wide irradiation range.

These points are summarized in the following comparative table.

[0030]

[Table 1]

[0031]

According to the present invention, as described above, an LED is provided at the center of a glove serving as a display unit as in the prior art to diffuse and emit light to the periphery of the glove, or a reflection means such as a reflecting mirror is used. The problem in the case of diffusing and emitting light is solved, and the following effects can be obtained. (1) Since there is nothing between the LED and the display unit, the LED light can be used efficiently without the LED light being attenuated. (2) The LED has a structure in which the LED is illuminated from the inner surface of the display unit toward the center toward the center, but the light does not attenuate due to the intersection of the LED lights. (3) Since the LED light is radiated from the position along the inner circumference of the glove to the periphery of the glove (facing part), it is half the diameter of the conventional irradiation from the central part to the periphery and the same size. Can be uniformly emitted in the irradiation range of. With the same diameter, the irradiation distance can be doubled. (4) Since the number of components is small, there are few failure factors and the reliability is high. (5) Since there are only a minimum number of parts, it is lighter than before (it is resistant to vibration). (6) Since the number of LEDs to be used is small, power saving and simplification of the structure are combined, and cost reduction is promoted.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is a sectional view of the first embodiment.

FIG. 3 is a plan view of a second embodiment.

FIG. 4 is a sectional view of a second embodiment.

FIG. 5 is a partial perspective view of the second embodiment.

FIG. 6 is a plan view of a third embodiment.

FIG. 7 is a sectional view of a third embodiment.

FIG. 8 is a plan view of a fourth embodiment.

FIG. 9 is a developed front view of the fourth embodiment.

FIGS. 10A and 10B are partial cross-sectional views of a fourth embodiment.

FIG. 11 is a plan view of a fifth embodiment.

FIG. 12 is a sectional view of a fifth embodiment.

FIG. 13 is a sectional view of a fifth embodiment.

FIG. 14 is a developed front view of the fifth embodiment.

FIG. 15 is a plan view of the sixth embodiment.

FIG. 16 is a sectional view of a sixth embodiment.

FIG. 17 is a bottom view of the seventh embodiment.

FIG. 18 is a sectional view of the seventh embodiment.

FIG. 19 is a plan view of the eighth embodiment.

FIG. 20 is a sectional view of the eighth embodiment.

FIG. 21 is a plan view of the ninth embodiment.

FIG. 22 is a sectional view of a ninth embodiment.

FIG. 23 is a plan view of the tenth embodiment.

FIG. 24 is a sectional view of the tenth embodiment.

FIGS. 25 (a), (b) and (c) are comparison diagrams of irradiation ranges using ordinary condensing LEDs.

26 (a), (b), and (c) are LEDs having a wide irradiation angle.
It is a comparison drawing of the irradiation range using.

[Explanation of symbols]

 A Indicator light 1 Globe 2 LED 3 Mounting part 11, 11 'Globe connection part 50 Rib 60 Narrow plate 70 Cylindrical body 80 Frame body 90 Wire 100 Shielding plate 101 Connection member

Claims (10)

[Claims] 1. A display lamp having an LED as a light source and one or more stages of gloves serving as a display unit, wherein a plurality of LEDs are provided at predetermined intervals at an inner periphery of the glove or at a position close to the inner periphery. LE, characterized in that light is diffused and emitted to the periphery of the globe facing the LED.
D indicator light. 2. The LED indicator lamp according to claim 1, wherein a plurality of LEDs are mounted on a ring-shaped substrate provided along the inner periphery of the globe. 3. The ring-shaped substrate is formed integrally with the glove,
The LED indicator lamp according to claim 2, comprising a rib located on the inner periphery of the glove. 4. The LED indicator lamp according to claim 2, wherein the ring-shaped substrate is formed of a narrow plate attached along the inner periphery of the globe. 5. The LED indicator lamp according to claim 2, wherein the ring-shaped substrate is formed of a sheet or film-like tubular body attached along the inner periphery of the glove. 6. The LED indicator lamp according to claim 2, wherein the ring-shaped substrate is formed by connecting a plurality of frames in a ring shape and attaching the frames along the inner circumference of the globe. 7. The LED indicator lamp according to claim 2, wherein the ring-shaped base is made of a wire attached along the inner periphery of the glove. 8. The LED indicator lamp according to claim 1, wherein the LED is mounted on a member provided to be connected to a shielding plate of the glove and located on the inner periphery of the glove. 9. The LED indicator lamp according to claim 1, wherein the LED is provided so as to emit light in an oblique direction. 10. The light emitting device according to claim 1, wherein the globe is formed as a liquid crystal panel.
ED indicator.